Abstract: A high-ageing-stable planar sheet for the building sector and to the use of a high-ageing-stable planar sheet in the building sector, in particular as a sarking sheet, underlay sheet and/or sheathing sheet in a roof construction and/or a façade sheet in a wall construction.

Abstract: The invention relates to a roofing underlay (1), especially one intended for use as roof cladding underlay and/or roof lining membrane, having at least one outer nonwoven layer (2), at least one inner nonwoven layer (3) and at least one microporous membrane layer (4) based on at least one polyolefin plastic, wherein the membrane layer (4) is arranged between the outer nonwoven layer (2) and the inner nonwoven layer. According to the invention, it is provided that at least one further microporous membrane layer (5) based on a polyolefin plastic is provided between the outer nonwoven layer (2) and the inner nonwoven layer and the further membrane layer (5) is separated from the membrane layer (4) by a separating layer (6), wherein the separating layer (6) is water-permeable and/or embodied as a structure made of fibers, especially nonwoven.

Abstract: The invention relates to a roofing underlay (1), especially one intended for use as roof cladding underlay and/or roof lining membrane, having at least one outer nonwoven layer (2), at least one inner nonwoven layer (3) and at least one microporous membrane layer (4) based on at least one polyolefin plastic, wherein the membrane layer (4) is arranged between the outer nonwoven layer (2) and the inner nonwoven layer. According to the invention, it is provided that at least one further microporous membrane layer (5) based on a polyolefin plastic is provided between the outer nonwoven layer (2) and the inner nonwoven layer and the further membrane layer (5) is separated from the membrane layer (4) by a separating layer (6), wherein the separating layer (6) is water-permeable and/or embodied as a structure made of fibers, especially nonwoven.

Abstract: A sheet (1), preferably for use in the building sector, and in particular, for sealing the shell of a building, comprising a planar sheet body (2) that has at least one elastic layer as a sealing layer (17) made of a material of such elasticity and such restoring force that, when the sealing layer (17) is penetrated by a fastener (4), the material of the sealing layer (17) surrounding the fastening means (4) encloses the fastener (4) and provides sealing in the region of the fastener (4). Alternatively, the sheet body contains a sealing material which, upon perforation of the sheet body, is able to automatically emerge or swell to an extent sufficient to close or seal the perforation.

Abstract: A sheet (1), preferably for use in the building sector, and in particular, for sealing the shell of a building, comprising a planar sheet body (2) that has at least one elastic layer as a sealing layer (17) made of a material of such elasticity and such restoring force that, when the sealing layer (17) is penetrated by a fastener (4), the material of the sealing layer (17) surrounding the fastening means (4) encloses the fastener (4) and provides sealing in the region of the fastener (4). Alternatively, the sheet body contains a sealing material which, upon perforation of the sheet body, is able to automatically emerge or swell to an extent sufficient to close or seal the perforation.